napi_build_skb() can return NULL on allocation failure. In
__octep_vf_oq_process_rx(), the result is used directly without a
NULL check in both the single-buffer and multi-fragment paths,
leading to a NULL pointer dereference.

Patch 1 introduces a helper to deduplicate the ring index advance
pattern, patch 2 adds the actual NULL checks.

---
v1 -> v2: split into refactor + fix per Simon Horman review.
v1: https://lore.kernel.org/netdev/Z-6w5kfCJoGhb30g@framework/

David Carlier (2):
  octeon_ep_vf: introduce octep_vf_oq_next_idx() helper
  octeon_ep_vf: add NULL check for napi_build_skb()

 .../marvell/octeon_ep_vf/octep_vf_rx.c        | 47 ++++++++++++++-----
 1 file changed, 36 insertions(+), 11 deletions(-)

-- 
2.53.0